282 APPENDIX. 



nitrogen = 177*04; and lastly O a weight of oxygen 

 = 100. 



The formula of proteine, C4SN6H36O14, expresses, there- 

 fore, 



48 times 76*437 = 3668*88 carbon, 

 6 times 177.040 = 1062*24 nitrogen, 

 36 times 12*478 = 449*26 hydrogen, 

 14 times 100*000 = 1400*00 oxygen. 



The sum gives a weight of 6580*38 proteine. 

 Therefore — 



In 100 parts. 

 In 6580*38 parts of proteine are contained 3668*88 carbon 55*742 



In 6580*38 ditto 1062*24 nitrogen 16*143 



In 6580*38 ditto 449*26 hydrogen 6*827 



In 6580*38 ditto 1400*00 oxygen 21*288 



100000 



The actual results of analysis, reduced to 100 parts, 

 when compared with the above numbers, will shew how 

 far the assumed formula is correct; or, supposing the for- 

 mula ascertained, they will shew the degree of accuracy 

 displayed by the experimenter. Thus the proportions in 

 100 parts, calculated from the formula, furnish an impor- 

 tant check to the operator, and, conversely, the formula 

 calculated from his results, when compared with other 

 known formulae, supplies a test of his accuracy, or of the 

 purity of the substance analyzed. 



